MBM rear disc brake wheel fitment problem.

[MagnumBarracuda]

I just installed the MBM small bolt pattern disc brake kit on my 8 3/4. I have 15in Rallye wheels but they hit the caliper in a way that even grinding a little bit would not help. Do these wheel not fit with the kit or did I do something wrong?

 

[72Dart6pack]

I'm sure they said somewhere they do not fit all rims. Read the fine print.

 

[Stanley Blake]

I just installed the same kit with 15x7 inch rally wheels and they hit the caliper also. I had to install longer wheel studs and a 3/16 inch wheel spacer.

 

[MagnumBarracuda]

I just installed the same kit with 15x7 inch rally wheels and they hit the caliper also. I had to install longer wheel studs and a 3/16 inch wheel spacer.

View attachment 1715330061

Did you also grind some material off of the caliper and the guide rods? I grinded a fair amount of material and put 1/4 in worth of washers to see if it would clear. It was still hitting. I'm considering oe mopar steel wheels with dog dish. They look like they would have more clearance but I'm not sure.

 

[Stanley Blake]

I did some grinding on the driver side caliper, but not on the passenger side.

 

[MagnumBarracuda]

Interesting... My driver side fits Fay better than the passenger. Haha quality control

 

[Stanley Blake]

Yes I did notice that the calipers looked a little different

 

[MagnumBarracuda]

I just installed the same kit with 15x7 inch rally wheels and they hit the caliper also. I had to install longer wheel studs and a 3/16 inch wheel spacer.

View attachment 1715330061

May i ask where and what size wheel studs you got?

 

[Stanley Blake]

Have to get back with you later with the part number

 

[Stanley Blake]

They were moser 8050, you can get them from jegs or summit. I was using acorn nuts so I had to cut them down some.

 

[MagnumBarracuda]

I just installed the same kit with 15x7 inch rally wheels and they hit the caliper also. I had to install longer wheel studs and a 3/16 inch wheel spacer.

View attachment 1715330061

Is that the smaller 5 by 4 bolt pattern? If so where did you find that wheel spacer? I'm unable to find one for small bolt pattern.

 

[Stanley Blake]

Yes it was 5x4 bolt pattern. I got the spacers from amazon, they measure them in mm. It will be 5x100 mm.

 

[MagnumBarracuda]

Yes it was 5x4 bolt pattern. I got the spacers from amazon, they measure them in mm. It will be 5x100 mm.

Interesting. I've seen the 5 by 4 pattern measured as 5 by 101.6. Is 5 by 100mm the same as the 5 by 4? Basically do themy mean the same thing?

 

[72Dart6pack]

Grinding parts. Wheel spacers. Cutting down Wheel studs. Boy this brake job is one hot mess.

 

[MagnumBarracuda]

Grinding parts. Wheel spacers. Cutting down Wheel studs. Boy this brake job is one hot mess.

If that's a hot mess you must have it extremely simple and easy on your projects

 

[72Dart6pack]

No not really. Did this without grinding anything.

 

[MagnumBarracuda]

No not really. Did this without grinding anything.

View attachment 1715332489

Then clearly you had it easier. You probably spent money on a good kit. Which I wish I had done.

 

[72Dart6pack]

I did. Doctor Diff rear disk brake kit.

 

[GMachineDartGT]

If that's a hot mess you must have it extremely simple and easy on your projects

Why would anyone use GMs most problematic caliper?